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Room-temperature ferromagnetism in Mn-doped semiconducting CdGeP2
1National Renewable Energy Laboratory, Golden, Colorado 80401, USA.
Physical Review Letters
|January 22, 2002
Abstract:
The chalcopyrite CdGeP2 doped with Mn have been recently found to exhibit room-temperature ferromagnetism. Isovalent substitution of the Cd site is expected, however, to create antiferromagnetism, in analogy with the well-known CdTe:Mn (d5) case. However, chalcopyrite semiconductors exhibit low-energy intrinsic defects. We show theoretically how ferromagnetism results from the interaction of Mn with hole-producing intrinsic defects.